| 摘要 |
A cordless telephone includes a base unit 300 and a handset 400, the base unit can be powered by primary power source 102 or in the event of a power cut by backup battery B1. The handset is powered by battery B4 which is charged when the charging terminal 243 is placed in contact with the base unit terminal 143 or alternatively using a non-contact arrangement (L500, L600 figure 8). In the event of a power failure an alarm circuit 120 alerts microprocessor U303 which will then operate the base circuitry from the battery. If during the power failure the handset battery becomes depleted then the microprocessor can use power from the backup battery to charge the handset battery. |
